Glass-cutter



UNITED STATES PATENT OFFICE.

J. COLLMANN AND H. FEENDERS, OF FREEPORT, ILLINOIS.

GLASS-CUTTER.

Specification of Letters Patent No. 30,722, dated November 27, 1860.

To all whom 'it may concern:

Be it known that we, JOHN COLLMANN and I-IARM Fnnxnnns, both ofFreeport, in the county of Stephenson and State of Illinois, haveinvented a certain new and Improved Instrument for Cutting Glass; and wehereby declare the following to be a full and exact description of thesame, reference being had to the accompanying drawing, making part ofthis specification.

Our said invention consists, lst, in the use of a regulator oradjustable bearing on the face of the bit, to cause the diamond to bearupon its highest or sharpest point as hereinafter explained; 2nd, in apivoted and spring connection between the handle and bit; 3d, in theconstruction and application of an adjustable breakerf7 hereinafterdescribed.

In the accompanying drawings, Figure l is a side elevation oftheinstrument with the parts in their normal position. Fig. 2 is anelevation partly in section exhibiting the positions of the respectiveparts when in use.

A represents the handle pivoted at a to the bit B, in a cavity b, so asto allow the said handle a limited motion in the plane of the bit.

S is a spring acting to restore and hold the bit to a position at rightangles to the handle.

D represents the diamond point projecting from the face of the bitin-customary manner.

E is a set screw called by us the regulator and employed to steady thebit as will be hereinafter explained.

F F is an adjustable glass breaker consisting of a fixed jaw F, and asliding jaw F, the proximity of which jaws is adjusted by means of a setscrew G to suit various` thicknesses of glass.

The operation is as follows: The regulator E is first adjusted to thelevel of the highest point of the diamond and the instrument is thenapplied in the usual manner, with the exception that the handle isinclined sufficiently to steady the bit upon the regulator by thepressure of the spring S.

It is well known that every diamond has but one point which is fit forcutting glass, and for this reason great care, skill and steadinessofhand are required in the use of the customary instrument for thispurpose, any inclination of the handle from its proper position causingthe instant withdrawal of the point from the glass, and consequentinterruption of the operation. From the foregoing explanation it will beclearly understood that in the use of our instrument, the position ofthe diamond in respect to the glass is not affected by a slight niotionof the handle in either direction or by a lack of steadiness in holdingthe same. The skill and care required in cutting glass, are thus greatlyreduced.

After cutting, the strip is removed by the application of the breaker FF', the jaws being adjusted to such a distance asunder as the thicknessof the glass may require.

IVe claim as new and of our invention herein and desire to secure byLetters Patent 1. The adjustable regulator E, applied to the face of thebit B, substantially as and for the purposes set forth.

2. The combination of the cavity b, spring S and pivot connection a,between the bit and handle, operating in the manner and for the purposesexplained.

3. The described combination of the fixed jaw F, sliding jaw F, and setscrew G, with the handle A of a glass cutting instrument for the objectstated.

In testimony of which invention, we hereunto set our hands.

JOHN COLLMANN. HARM FEENDERS. Witnesses FRED. O. INGALLs, JOHN A. CLARK.

